Numbers 14:31
But your little ones, which ye said should be a prey, them will I bring in, and they shall know the land which ye have despised.
Cross-reference
In Numbers 14:3 the people fear their little ones will become plunder; Numbers 14:31 quotes that fear and reverses it into a promise of possession.
Numbers 26:64 confirms that none of the adult generation from Sinai's census survived to enter the land, fulfilling the judgment in Numbers 14:31.
Deuteronomy 1:39 repeats the promise that the little ones considered prey will enter and possess the land, exactly parallel to Numbers 14:31.
Joshua 5:7 directly fulfills this promise: the children raised in the wilderness are circumcised upon entering the land, as stated here.
Nehemiah 9:24 recounts the descendants entering and possessing the land, directly fulfilling the promise that the little ones would know it.
Hebrews 4:6 explicitly references this generation's failure to enter God's rest due to disobedience, applying the same promise of entry to believers.